The original entrance step for our Minuets was not a permanently mounted folding step as utilized in other Argosy travel trailers. Our Minuets utilized a portable step that was most often stored upside down next to the cabinet on the hinge side of the door. I was fortunate to purchase my Minuet from its original owner who provided me with the factory portable step. The step is shown in the photo below:
The step is constructed of heavy alumnum with rivets joining the individual pieces. I suspect that the steps were likely made in the Argosy plant. The non-slip tread started out life as a medium orange, but mine has faded and is now more of a medium brown.
I like the simplicity of the portable step's design, and it is amazingly solid and stable.
Good luck with your investigation!